Method and apparatus for coding a digitized original picture and method and apparatus for decoding a digitized coded picture
US7013048B2 · kind B2 · utility
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2References
20Claims
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Key dates
| Filing date | Sep 13, 2001 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Jul 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The discrete cosine transform of the prediction error is not necessarily calculated, rather the DCT of the original picture to be transmitted and the DCT of the temporally preceding reconstructed picture are calculated separately from one another. By comparing the amplitudes of the coefficients from the original signal with respect to the difference between the coefficients from the original signal and the reconstructed picture, a decision is made for each coefficient as to whether the coefficient of the original signal or the difference between the coefficients is transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.